Mattress



FIG. 1 is a top isometric view of a mattress of the present invention.

FIG. 2 is a right side plan view of the mattress of FIG. 1.

FIG. 3 is a front end plan view of the mattress of FIG. 1.

FIG. 4 is a left side plan view of the mattress of FIG. 1.

FIG. 5 is a rear end plan view of the mattress of FIG. 1; and,

FIG. 6 is a bottom plan view of the mattress of FIG. 1.

The portions of the mattress shown in broken lines are included for purposes of illustrating environment and form no part of the claimed design. 

CLAIM I claim the ornamental design for a mattress, as shown and described. 